diff --git a/_baseWrapperValue.js b/_baseWrapperValue.js
index c9d1b2bad..3e6990ad8 100644
--- a/_baseWrapperValue.js
+++ b/_baseWrapperValue.js
@@ -17,7 +17,7 @@ function baseWrapperValue(value, actions) {
   if (result instanceof LazyWrapper) {
     result = result.value();
   }
-  return arrayReduce(actions, (result, action) => action.func.apply(action.thisArg, arrayPush([result], action.args)), result);
+  return arrayReduce(actions, (result, { func, thisArg, args }) => func.apply(thisArg, arrayPush([result], args)), result);
 }
 
 export default baseWrapperValue;
diff --git a/_getMapData.js b/_getMapData.js
index 6f55f4f79..7851b5403 100644
--- a/_getMapData.js
+++ b/_getMapData.js
@@ -8,8 +8,8 @@ import isKeyable from './_isKeyable.js';
  * @param {string} key The reference key.
  * @returns {*} Returns the map data.
  */
-function getMapData(map, key) {
-  var data = map.__data__;
+function getMapData({ __data__ }, key) {
+  var data = __data__;
   return isKeyable(key)
     ? data[typeof key == 'string' ? 'string' : 'hash']
     : data.map;